#include<stdio.h>
#define MASS_PER_MOLE 3.0e-23
#define MASS_PER_QUART 950
int main()
{
	float quart, quantity;
	printf("enter how many quart:");
	scanf_s("%f", &quart);
	quantity = quart * MASS_PER_QUART/ MASS_PER_MOLE;
	printf("%e", quantity);
	return 0;

}